Commenting on the rising popularity of people using mobile applications to enhance their selfies, SMU Associate Professor of Psychology Norman Li, who researches mate preferences, mate value and evolutionary social psychology, said that he is not surprised at the popularity of such apps. He said: "People are increasingly living through their mobile phones. So it is not surprising that they are turning to these apps to make their online photos more attractive." However, he warns that these apps can fuel a general dissatisfaction with one's appearance, since nobody can look "perfect" all the time. "For those looking to meet someone online, the app will definitely help users get their foot in the door," he said. "But it also means potential suitors might be disappointed when meeting the subject in person."